MX7705 datasheet(3/33 Pages) MAXIM

3 / 33 page

16-Bit, Low-Power, 2-Channel,

Sigma-Delta ADC

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ELECTRICAL CHARACTERISTICS (continued)

(VDD = 3V or 5V, GND = 0, VREF+ = 1.225V for VDD = 3V and VREF+ = 2.5V for VDD = 5V, VREF- = GND, external fCLKIN =

2.4576MHz, CLKDIV bit = 0, CREF+ to GND = 0.1µF, CREF- to GND = 0.1µF, TA = TMIN to TMAX, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Gain = 1

Gain = 2

Gain = 4

AIN Input Capacitance

Gain = 8 to 128

AIN Input Sampling Rate

Gain = 1 to 128

fCLKIN /

MHz

Gain = 1

Gain = 2

105

Gain = 4

110

VDD = 5V

Gain = 8 to 128

130

Gain = 1

105

Gain = 2

110

Gain = 4

120

Input Common-Mode Rejection

CMR

VDD = 3V

Gain = 8 to 128

130

Normal-Mode 50Hz Rejection

For filter notches of 25Hz, 50Hz,

±0.02

× fNOTCH

Normal-Mode 60Hz Rejection

For filter notches of 20Hz, 60Hz,

±0.02

× fNOTCH

Common-Mode 50Hz Rejection

For filter notches of 25Hz, 50Hz,

±0.02

× fNOTCH

150

Common-Mode 60Hz Rejection

For filter notches of 20Hz, 60Hz,

±0.02

× fNOTCH

150

EXTERNAL REFERENCE (REF+, REF-)

VDD = 4.75V to 5.25V

1.0

3.5

REF Differential Input Voltage

Range (Note 9)

VREF

VDD = 2.7V to 3.6V

1.00

1.75

REF Absolute Input Voltage Range

GND

VDD

REF Input Capacitance

Gain = 1 to 128

REF Input Sampling Rate

fCLKIN /

MHz

DIGITAL INPUTS (DIN, SCLK,

CS, RESET)

Input High Voltage

VIH

VDD = 4.75V to 5.25V

0.8

Input Low Voltage

VIL

VDD = 2.7V to 3.6V

0.4

DIN,

CS, RESET

250

Input Hysteresis

VHYST

SCLK

500

Input Current

IIN

±1

µA

Input Capacitance

5pF

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